Numerical investigation of alternative process conditions for influencing the thermal history of spray deposited billets

Abstract

In spray forming, during the spray deposition process and the subsequent cooling period a time dependent temperature field develops within the product and the solidification of the remaining liquid fraction takes place. In this paper, the time dependent thermal conditions and solidification behaviour in spray formed billets are investigated. A transient numerical simulation is carried out and compared with experimental results. A description of the relevant model and the developed program will be given and an investigation of the influence of different process parameters on the time dependent temperature field and the solidification history within billets are shown. The numerical model is based on a single-phase formulation of the energy equation. A non-orthogonal coordinate system is used for grid generation within the time dependent growing shape of the billet. Temperature measurements are carried out within the substrate and also in the lower part of the billet in the spray forming process. The material discussed throughout this contribution is CuSn6 (2.1020).